OFFSET
0,4
LINKS
Max Alekseyev, Table of n, a(n) for n = 0..100
EXAMPLE
a(3)=38659=67*577 since sigma(67*577)=(2^2*17)*(2*17^2)=2^3*17^3 and 38659 is the smallest such number.
CROSSREFS
KEYWORD
nonn
AUTHOR
Walter Kehowski, Sep 06 2010
EXTENSIONS
Terms a(16) onward from Max Alekseyev, Mar 04 2014
STATUS
approved